I (19F) just got back from an Easter get together with my family and need some outside opinions on this situation.

This morning I went to brunch at my parents house for Easter. It was a relatively small get together, with only my parents, siblings and a couple cousins who were in the area. I think maybe 12 people total including kids.

Due to the magority of us being adults, there was a decent amount of alcohol being passed around. I feel the need to mention this for later.

A little before brunch, my mom surprised me, my brother and my sister (26F) with Easter baskets for us both. It wasn't anything fancy, just some chocolate and socks but I loved it anyways.

I thanked my mom and I mentioned it was funny she thought to do this because I did something similar for my fiancé that morning (he was not at the brunch because of his job). While we were talking my sister came in to refill her drink and heard us talking and decided to jump into the conversation.

She asked if I'd made her a basket too. At first I thought she was joking but when I tried to laugh it off she got upset with me. (For context, we haven't been on the best terms for a while now, but I'm not getting into that).

She started poking fun at me, calling me lazy and forgetful and a bad sister. I was got upset and my mom tried to meditate by offering my sister another drink, but my sister pushed passed her and tried to swat at my face.

Now I think it's important to mention, my sister was definitely tipsy. She'd been drinking the entire morning (mimosas and an alcoholic punch our mom made).

That said, when she tried to swat at me I blocked her on instinct which set her off balance. She stumbled a little then dramatically collapsed and started crying. I froze.

My mom immediately bent down to soothe her and it took about 15 minutes and another glass of alcohol to coax her away from the dining room and back out to the yard. My mom laughed it off afterwards so I didn't think much of it.

Later, I rejoined the group outside with a cup of coffee and everyone was giving me weird looks. Not staring or anything, but giving me weary glances the whole time. Eventually, my brother asked me to help him with something and then pulled me aside.

He asked my why I pushed Cindy (my sister) and I was confused. He then told me Cindy had said we'd have an altercation in the kitchen where I had apparently shoved her into the counter and pushed her to the ground because I thought she didn't deserve an Easter basket. I was stunned.

Apparently, she told everyone I had said she was undeserving of an Easter basket and shoved her.

I clarified what happened and thought that would be the end of it.

But when we finally sat down to eat, my mom tried to sit Cindy next to me and she made a huge stink about it, relaying the story that I had shoved her because of an Easter basket. I was annoyed by now so I clarified, probably louder than was necessary, what happened.

She got incredibly upset and ending up storming out and leaving. Brunch was really awkward after that.

When I left, I for a text from my mom asking Cindy and I to apologize to each other (this was in a group chat). Cindy refused to apologize unless I apologized first and it became a whole thing.

Now everyone at brunch is pretty divided, my brother being practically the only one on my side.

So now I'm asking for some outside opinions. AITA here?